Re: [ckrm-tech] [RFC][PATCH][0/4] Memory controller (RSS Control)

From: Kirill Korotaev
Date: Mon Feb 19 2007 - 04:37:54 EST

> On 2/19/07, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
>>Alas, I fear this might have quite bad worst-case behaviour. One small
>>container which is under constant memory pressure will churn the
>>system-wide LRUs like mad, and will consume rather a lot of system time.
>>So it's a point at which container A can deleteriously affect things which
>>are running in other containers, which is exactly what we're supposed to
>>not do.
> I think it's OK for a container to consume lots of system time during
> reclaim, as long as we can account that time to the container involved
> (i.e. if it's done during direct reclaim rather than by something like
> kswapd).
hmm, is it ok to scan 100Gb of RAM for 10MB RAM container?
in UBC patch set we used page beancounters to track containter pages.
This allows to make efficient scan contoler and reclamation.

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